---
product_id: 742006954
title: "Rx Clear Mega Shock | 73% Calcium Hypochlorite | Kills Algae in Swimming Pools | Works As Pool Sanitizer Clarifier and Algicide | One Pound Bags | 48 Pack"
brand: "rx clear"
price: "11873 kr"
currency: DKK
in_stock: true
reviews_count: 5
category: "Rx Clear"
url: https://www.desertcart.dk/products/742006954-rx-clear-mega-shock-73-calcium-hypochlorite-kills-algae-in
store_origin: DK
region: Denmark
---

# Nighttime application - Maximize shock efficiency 73% Calcium Hypochlorite - Ultra concentrated power 1 lb per 10,000 gal dosing - Precise, easy maintenance Rx Clear Mega Shock | 73% Calcium Hypochlorite | Kills Algae in Swimming Pools | Works As Pool Sanitizer Clarifier and Algicide | One Pound Bags | 48 Pack

**Brand:** rx clear
**Price:** 11873 kr
**Availability:** ✅ In Stock

## Summary

> 💧 Shock your pool into sparkling perfection — because clear water waits for no one!

## Quick Answers

- **What is this?** Rx Clear Mega Shock | 73% Calcium Hypochlorite | Kills Algae in Swimming Pools | Works As Pool Sanitizer Clarifier and Algicide | One Pound Bags | 48 Pack by rx clear
- **How much does it cost?** 11873 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/742006954-rx-clear-mega-shock-73-calcium-hypochlorite-kills-algae-in)

## Best For

- rx clear enthusiasts

## Why This Product

- Trusted rx clear brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Algae Annihilator:** Use 2 lbs per 14,000 gallons to beat green algae and keep your pool pristine
- • **Chlorine Power Boost:** 73% calcium hypochlorite delivers rapid, effective shock treatment
- • **Smart Dosing Formula:** 1 lb per 10,000 gallons ensures hassle-free, consistent pool care
- • **Nighttime Shock Advantage:** Apply after dark for maximum chlorine activation and minimal disruption
- • **Triple-Action Pool Savior:** Sanitizes, clarifies, and kills algae for crystal-clear water

## Overview

Rx Clear Mega Shock is a premium 73% calcium hypochlorite granular pool shock that acts as a sanitizer, clarifier, and algicide. Designed for professional-grade pool maintenance, it rapidly boosts chlorine levels to eliminate algae and maintain crystal-clear water. Easy to use with precise dosing instructions, it works best when applied at night and is ideal for above or in-ground pools. Trusted by thousands for reliable, cost-effective pool care.

## Description

A powerful, highly dense chlorinated shock treatment that will remove the green algae from your swimming pool water by just following the recommended dosage of this product. Be sure to pre-dissolve this powdered substance in a bucket of water before dispensing it around the perimeter of your swimming pool while your pump is running. NOTE: Cannot be sold or shipped to Maine.

Review: Works just as well as Leslie’s 73 cal hypo shock, but cheaper. I was having a problem trying to get my free chlorine level to even register on my test strips. 2lbs of this shock (mixed in a bucket 1 lb at a time) sky rocketed my free chlorine levels. My pic of the pool is a little cloudy due to the chlorine level being high right now, but I’m sure that will resolve itself over the next few days as the levels come down. It’s been crazy 90 degree hot every day around here for a couple of weeks now. The test strip pic is from today, 2 days after I put the shock in a couple of nights ago. Next week if the fc level is low, I’m going to try 1lb instead of 2, and see what happens with the increase in free chlorine levels. If u want a jolt in your free chlorine levels, this stuff works.
Review: This shock works wonderfully in my pool. Keeps my chlorine at a predictable level. I see a huge difference in the quality of this shock compared to what I had been using. I use it for weekly maintenance and haven’t had an algae episode all summer, and it’s been hot. I will continue to purchase the Shock in the future.

## Features

- MULTI-PURPOSE - This swimming pool shock works as a strong sanitizer, clarifier, and algicide for clear blue water.
- EXTRA POWER - Due to its high percentage of chlorine, Mega Shock is a very effective treatment for a quick chlorine boost. The Rx Clear Mega shock packets are chlorinating essentials.
- MIX BEFORE YOU FIX - Add this granular powder to a bucket of water before you begin dissolving it in your pool. Add a 1 lb bag per 10,000 gallons of pool water for smart maintenance.
- BEAT THE GREEN - Keep in your swimming pool algae free by adding 2 bags (2 lbs) of shock per 14,000 gallons of pool water. These granules work as an algaecide if your pool needs cleaning, or if you're opening for the season.
- WORKS BEST AT NIGHT - Maximize performance by adding this shock to your pool at night. Wait to swim 8 to 10 hours after you start the application. Trust Rx Clear to supply reliable chemicals, supplies, and equipment for your above or in ground pool, spa or hot tub.
- NOTE: Cannot be sold or shipped to Maine.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B073S9SD4P |
| Brand Name | Rx Clear |
| Customer Reviews | 4.7 4.7 out of 5 stars (436) |
| Item Form | Granular, Powder |
| Item Weight | 1 Pounds |
| Manufacturer | Rx Clear |
| Manufacturer Part Number | 20406348 |
| Product Benefits | Controls Algae |
| UPC | 635963662035 |
| Unit Count | 768 Grams |

## Product Details

- **Brand:** Rx Clear
- **Item form:** Granular, Powder
- **Item weight:** 454 g
- **Product benefits:** Controls Algae
- **UPC:** 635963662035

## Images

![Rx Clear Mega Shock | 73% Calcium Hypochlorite | Kills Algae in Swimming Pools | Works As Pool Sanitizer Clarifier and Algicide | One Pound Bags | 48 Pack - Image 1](https://m.media-amazon.com/images/I/71MPMSIRDxL.jpg)
![Rx Clear Mega Shock | 73% Calcium Hypochlorite | Kills Algae in Swimming Pools | Works As Pool Sanitizer Clarifier and Algicide | One Pound Bags | 48 Pack - Image 2](https://m.media-amazon.com/images/I/810wWp-lyVL.jpg)
![Rx Clear Mega Shock | 73% Calcium Hypochlorite | Kills Algae in Swimming Pools | Works As Pool Sanitizer Clarifier and Algicide | One Pound Bags | 48 Pack - Image 3](https://m.media-amazon.com/images/I/71f2UET1odL.jpg)
![Rx Clear Mega Shock | 73% Calcium Hypochlorite | Kills Algae in Swimming Pools | Works As Pool Sanitizer Clarifier and Algicide | One Pound Bags | 48 Pack - Image 4](https://m.media-amazon.com/images/I/71iKHytBp+L.jpg)
![Rx Clear Mega Shock | 73% Calcium Hypochlorite | Kills Algae in Swimming Pools | Works As Pool Sanitizer Clarifier and Algicide | One Pound Bags | 48 Pack - Image 5](https://m.media-amazon.com/images/I/71DAuRhIOEL.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by G***N on 15 July 2025*

Works just as well as Leslie’s 73 cal hypo shock, but cheaper. I was having a problem trying to get my free chlorine level to even register on my test strips. 2lbs of this shock (mixed in a bucket 1 lb at a time) sky rocketed my free chlorine levels. My pic of the pool is a little cloudy due to the chlorine level being high right now, but I’m sure that will resolve itself over the next few days as the levels come down. It’s been crazy 90 degree hot every day around here for a couple of weeks now. The test strip pic is from today, 2 days after I put the shock in a couple of nights ago. Next week if the fc level is low, I’m going to try 1lb instead of 2, and see what happens with the increase in free chlorine levels. If u want a jolt in your free chlorine levels, this stuff works.

### ⭐⭐⭐⭐⭐ Review
*by B***P on 6 August 2024*

This shock works wonderfully in my pool. Keeps my chlorine at a predictable level. I see a huge difference in the quality of this shock compared to what I had been using. I use it for weekly maintenance and haven’t had an algae episode all summer, and it’s been hot. I will continue to purchase the Shock in the future.

### ⭐⭐⭐⭐⭐ Review
*by B***Y on 13 July 2025*

FINALLY! Actual chlorine that works. I was using Leslie’s Pool chlorine and Sam’s Club members mark version (not chlorine) and had so many issues with algae and cloudy water. I finally tried this product and have had crystal clear water all year even through storm season. 73% Cal is where it’s at. I wasted hundreds of dollars and tons of time dealing with algae and cloudy nasty water. This is worth its weight in gold.

## Frequently Bought Together

- Rx Clear Mega Shock | 73% Calcium Hypochlorite | Kills Algae in Swimming Pools | Works As Pool Sanitizer Clarifier and Algicide | One Pound Bags | 48 Pack
- Rx Clear 3" Inch Stabilized Chlorine Tablets | 50 Pounds | Individual Chlorinating Tabs for Sanitizing Swimming Pools & Spas | Long Lasting, Slow Dissolving, and UV Protected
- Clorox® Pool&Spa™ Swimming Pool Algaecide and Clarifier, Prevents and Treats Pool Algae, Clears Water, 128 Fl Oz (Pack of 1)

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-05-11*